They are hiring. I've seen one role listed for more than a year, and it's because of their hiring process. Here's a random job, by way of example: https://canonical.com/careers/3433732/application Search for "how did you perform", and be baffled at their recruitment strategy.
Not true though. Internally they can “shell out” to sub-tasks that know how to do specific things. The specific things don’t have to be models.
(I’m specifically talking about commercial hosted ones that have the capability i describe - obviously your run of the mill one downloaded off of the internet cannot do this).
You can still do “unsafe” stuff in rust, and people do. It’s perfectly possible to write safe C and C++ these days. And you don’t have to deal with a borrow checker, and a very small pool of developers available to hire.